1020110221000 has 64 divisors (see below), whose sum is σ = 2570677789680. Its totient is φ = 376656076800.

The previous prime is 1020110220937. The next prime is 1020110221001. The reversal of 1020110221000 is 1220110201.

It can be written as a sum of positive squares in 8 ways, for example, as 66686864644 + 953423356356 = 258238^2 + 976434^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (1020110221001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39222009 + ... + 39248008.

Almost surely, 2^{1020110221000} is an apocalyptic number.

1020110221000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020110221000 is an abundant number, since it is smaller than the sum of its proper divisors (1550567568680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1020110221000 is a wasteful number, since it uses less digits than its factorization.

1020110221000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78470051 (or 78470037 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 1020110221000 its reverse (1220110201), we get a palindrome (1021330331201).

The spelling of 1020110221000 in words is "one trillion, twenty billion, one hundred ten million, two hundred twenty-one thousand".